fix <rdar://24314506> QoI: Fix-it for dictionary initializer on required class var suggests [] instead of [:]

a simple apparent typo or thinko

Author: lattner

lib/Sema/TypeCheckDecl.cpp

@@ -6350,7 +6350,7 @@ static Optional<std::string> buildDefaultInitializerString(TypeChecker &tc,
         return std::string(String); \
     }
     CHECK_LITERAL_PROTOCOL(ArrayLiteralConvertible, "[]")
-    CHECK_LITERAL_PROTOCOL(DictionaryLiteralConvertible, "[]")
+    CHECK_LITERAL_PROTOCOL(DictionaryLiteralConvertible, "[:]")
     CHECK_LITERAL_PROTOCOL(UnicodeScalarLiteralConvertible, "\"\"")
     CHECK_LITERAL_PROTOCOL(ExtendedGraphemeClusterLiteralConvertible, "\"\"")
     CHECK_LITERAL_PROTOCOL(FloatLiteralConvertible, "0.0")

test/decl/var/properties.swift

@@ -1175,3 +1175,9 @@ _ = r19874152S5()  // ok
 
 
 
+// <rdar://problem/24314506> QoI: Fix-it for dictionary initializer on required class var suggests [] instead of [:]
+class r24314506 {  // expected-error {{class 'r24314506' has no initializers}}
+  var myDict: [String: AnyObject]  // expected-note {{stored property 'myDict' without initial value prevents synthesized initializers}} {{34-34= = [:]}}
+}
+
+